Book/Report FZJ-2018-03768

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One- dimensional model of a Tokamak edge plasma under conditions of strong impurity radiation



1992
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 2588, 44 p. ()

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Report No.: Juel-2588

Abstract: The edge plasma in tokamaks (within the last closed magnetic surface touching the limiter) is studied theoretically under conditions when the radiation from light impurities makes a strong contribution to its thermal balance. Simple appoximative formulas are proposed for the dependences of cooling rates of impurity ions on the electron temperature. A theory is developed for the so-called radiative potential equal the energy losses by electrons on the ionization and excitation of an impurity particle entering the discharge. The conditions of the onset of the states with "detached plasma" are explained for discharges with ohmic heating. The discharges with auxiliary heating and neon puffing are studied. The theory results are compared in detail with the experimental data from TEXTOR.


Contributing Institute(s):
  1. Publikationen vor 2000 (PRE-2000)
Research Program(s):
  1. 899 - ohne Topic (POF3-899) (POF3-899)

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 Record created 2018-06-26, last modified 2021-01-29


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